312031431 has 6 divisors (see below), whose sum is σ = 450712080. Its totient is φ = 208020948.

The previous prime is 312031429. The next prime is 312031453. The reversal of 312031431 is 134130213.

312031431 is a `hidden beast` number, since 31 + 203 + 1 + 431 = 666.

It is not a de Polignac number, because 312031431 - 2¹ = 312031429 is a prime.

It is a super-2 number, since 2×312031431² = 194727227863815522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312031411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17335071 + ... + 17335088.

It is an arithmetic number, because the mean of its divisors is an integer number (75118680).

Almost surely, 2^312031431 is an apocalyptic number.

312031431 is a deficient number, since it is larger than the sum of its proper divisors (138680649).

312031431 is a wasteful number, since it uses less digits than its factorization.

312031431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34670165 (or 34670162 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 312031431 is about 17664.4114252358. The cubic root of 312031431 is about 678.2650633011.

Adding to 312031431 its reverse (134130213), we get a palindrome (446161644).

The spelling of 312031431 in words is "three hundred twelve million, thirty-one thousand, four hundred thirty-one".